Envelop.



c. B. KILBY.

nnvnnor. APPLIOA'I'ION FILED JAN. 11, 1909.

Patented Nov. 23, 1909. 2 sums-sum 1.

28% mm &c 3

ANDREW. a GRAHAM (20.. mum-umsnluigl. mmnunm 11 l G. B. KILBY.

ENVELOP. APBLIOATION FILED Minn, 1909.

Patented Nov. 23', 1909.

2 snnnTs-sgpm 2.

" UN H CHARLEY B. KILBY, OF CBUMPLER, NORTH CAROLINA.

ENVELOP.

Specification of Letters Patent.

Patented Nov. 23, 1909.

Application filed January 11, 1909. Serial No. 471,633.

To all whom it may concern: i

Be it known that I, CI-IARLEY B. KILBY, a

citizen of the United States, residing at ranged flatwise, or in theform of an ordi-' nary envelop, distended into box-like form, ordistended into semiboX-like form without structural change or thedisconnecting of any ofthe parts.

lVith this and other objects in view the invention consists in certainnovel features of construction as hereafter shown and described and thenspecifically pointed out in the claims, and in the drawings illustrativeof the preferred embodiment of the invention, Figure l is a view of theblank from which the envelop is constructed. Fig. 2 is a view of theenvelop arranged in flatwise form. Fig. 3 is a section on the line 3-3of Fig. 2. Fig. 4 is a view of the envelop arranged in semiboX-likeform. Fig. 5 is an end view of the envelop arranged as shown in Fig. 4.Fig. 6 is a view of the envelop'arranged in box-like form. Fig. 7 is anend view of the envelop arranged as shown in Fig. 6.

The improved envelop may be formed of any required size or of anysuitable material, and it is not, desired therefore to limit theinvention to any particular size or proportions, or to any specificmaterial.

The improved device is formed from the blank shown in Fig. 1 andcomprises a body 10 having end flaps 11-12, a back flap 13 and a closureorsealing flap 14.

Between the body 10 and the end flaps 11l2 and between the back flap13and the closure flap 14: are intermediate portions 151617-18. Theseintermediate portions are defined from the body portions and the flapsby folding creases indicated by dotted lines 20, while the intermediateportions 15-16 are also provided with diagonal folding creases indicatedat 2122.

Projecting from the end of the intermediate portion 15 nearest to theback flap 18 is a small tongue 23 separated from the back flap 18 by acleft 2 1, while a similar tongue 25 extends from the corresponding endof the intermediate portion 16 and separated from the back flap 13 by acleft 2s. The tongues 2325 are defined from the intermediate portions1516 by folding creases indicated respectively at 27-28..

With a blank thus formed, if itis desired to produce a folded envelopsubstantially of ordinary construction, the tongues 2325 are foldedinwardly upon the intermediate portions 1516 and the end flaps and theirassociated intermediate portions are folded inwardly upon the body 10,and the back flap 13 together with its intermediate portion 17 foldedupon the folded end flaps and the closure flap 14. with its intermediateportion 18 folded upon the folded end flaps and upon the point portionof the back flap, as shown in Figs. 2 and 3. By this means an envelop ofordinary form is produced, as will be obvious.

If it is desired to arrange the envelop in box-like form, as shown inFigs. 6 and 7, the end flaps together with their intermediate portions1516 are folded at right angles to the body, and the back flap 13together with its intermediate portion 18 also folded at right angles tothe body, this operation locating the tongues 2325 in position to besecured against the intermediate portion 18 by pasting or otherwise. Thefree portions of the end flaps are then folded inwardly with theirterminals overlapping and pasted together, and the free portion of theback flap folded over upon the folded end flaps "and the free portion ofthe closure flap folded upon the folded end flaps, as shown in Figs. 6and 7. By this means the envelop is arranged in box-like form, as willbe obvious.

If it is desired to fold the envelop in semibOX-llkG' form as shown inFigs. 4 and 5, the end flaps and back flap are arranged as abovedescribed for producing the box-like form, with the end flaps foldedinwardly along the diagonal folding creases 2122,

which will bring the portions of the end flaps neXt to the closure flapclose to the body 10, but with the opposite ends of the portions 1516spaced away from the body a distance equal to the width of the tongues2325, as will be obvious, thus producing an envelop in the form shown inFig. 5, or with the sides converging toward the closure fla f he endflap 11 and the back flap l3 and closure flap let will be providedrespectively with mucilage or like adhesive substance or materialindicated at 2930 31, to provide means for securing the envelop infolded position. The tongues 2325 may also be provided with adhesivematerial if required. By this means it will be obvious that a simplyconstructed envelop is produced which may be folded in any one of threeways, without structural changes in the device or detaching any of itsparts.

The envelop may be constructed without additional expense over that ofan ordinary envelop as no more material is required for producing it.

WVhat is claimed, is

An envelop comprising a body having end flaps and with a back flap and aclosure flap extending respectively from the side edges, the variousflaps having intermediate portions between them and the body portion anddefined therefrom by folding creases and with the intermediate portionsbetween the end flaps and body each provided with a diagonal foldingcrease and a foldable tongue projecting from one end, whereby, anenvelop having a flat form, a box-like, or a semiboX-like form may beproduced without structural change or disconnecting any of the parts.

In testimony whereof, I afiix my signature, in presence of twowitnesses.

CHARLEY B. KILBY. Witnesses ELIJAH FRANCIS, L. V. FRANCIS.

